نتایج جستجو برای: semi analytical model

تعداد نتایج: 2336976  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه ارومیه 1377

the methods which are used to analyze microstrip antennas, are divited into three categories: empirical methods, semi-empirical methods and full-wave analysis. empirical and semi-empirical methods are generally based on some fundamental simplifying assumptions about quality of surface current distribution and substrate thickness. thses simplificatioms cause low accuracy in field evaluation. ful...

Journal: :energy equipment and systems 2015
razieh hamedi alireza javaheri omid dehghan farshad torabi

the shape of wake behind a wind turbine is normally assumed to have a hat shape for the models used in wind farm layout optimization purposes; however, it is know from experimental tests and numerical simulations that this is not a real assumption. in reality, the results of actual measurements and detailed numerical simulation show that the velocity in wake region has a s-shape profile. the pr...

Journal: :Journal of Fluids and Structures 2021

A semi-analytical model of hydroelastic slamming for two-dimensional symmetric flexible bodies is presented in this paper. The hydrodynamic loads are computed using the analytical Modified Logvinovich Model (MLM) with account elastic deflections body surface. described by modal approach. rigid and motions at same time together wetted part coupled problem impact reduced to a system nonlinear ord...

Journal: :journal of computational applied mechanics 0
mohsen azimi m.sc. student, school of mechanical engineering college of engineering, university of tehran, tehran, iran mohammad reza hairi yazdi associate professor, school of mechanical engineering college of engineering, university of tehran, tehran, iran

in this paper an energy dissipation rate control (edrc) method is introduced, which could provide stable walking or running gaits for legged robots. this method is realized by developing a semi-analytical pattern generation approach for a robot during each single support phase (ssp). as yet, several control methods based on passive dynamic walking have been proposed by researchers to provide an...

Journal: :Journal of Mechanical Design 2018

Journal: :Journal of Physics: Conference Series 2016

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تبریز 0

a semi-empirical mathematical model for predicting physical part of ignition delay period in the combustion of direct - injection diesel engines with swirl is developed . this model based on a single droplet evaporation model . the governing equations , namely , equations of droplet motion , heat and mass transfer were solved simultaneously using a rung-kutta step by step unmerical method . the...

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